Add 2/3 and 21/81
2/3 + 21/81 is 25/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 3 × 27 = 81,
2/3 = 2 × 27/3 × 27 = 54/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
21/81 = 21 × 1/81 × 1 = 21/81 - Add the two like fractions:
54/81 + 21/81 = 54 + 21/81 = 75/81 - 75/81 simplified gives 25/27
- So, 2/3 + 21/81 = 25/27
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